2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * CPU specific code for the MPC5xxx CPUs
32 #include <asm/processor.h>
36 DECLARE_GLOBAL_DATA_PTR;
38 ulong clock = gd->cpu_clk;
45 printf (" (JTAG ID %08lx)", *(vu_long *)MPC5XXX_CDM_JTAGID);
47 printf (" at %s MHz\n", strmhz (buf, clock));
52 /* ------------------------------------------------------------------------- */
55 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
59 *(vu_long *)MPC5XXX_CDM_SRESET &= ~(1 << 16); /* Checkstop Reset enable */
61 /* Interrupts and MMU off */
62 __asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
64 msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
65 __asm__ __volatile__ ("mtmsr %0"::"r" (msr));
68 * Trying to execute the next instruction at a non-existing address
69 * should cause a machine check, resulting in reset
71 #ifdef CFG_RESET_ADDRESS
72 addr = CFG_RESET_ADDRESS;
75 * note: when CFG_MONITOR_BASE points to a RAM address, CFG_MONITOR_BASE
76 * - sizeof (ulong) is usually a valid address. Better pick an address
77 * known to be invalid on your system and assign it to CFG_RESET_ADDRESS.
79 addr = CFG_MONITOR_BASE - sizeof (ulong);
81 ((void (*)(void)) addr) ();
86 /* ------------------------------------------------------------------------- */
89 * Get timebase clock frequency (like cpu_clk in Hz)
92 unsigned long get_tbclk (void)
94 DECLARE_GLOBAL_DATA_PTR;
98 tbclk = (gd->bus_clk + 3L) / 4L;
103 /* ------------------------------------------------------------------------- */